Abstract: A ready to assemble chair base includes three leg components. First and second leg components each include two of the five legs, and a third leg component includes a single leg. A hub portion of all three components includes a portion of the central tapered hole. The hub portions of the first and second components join together with vertical interlocking surfaces slidably locking together in the direction of the axis of the central tapered hole. The hub of the third leg component is formed in the shape of a tenon blade and is inserted into a horizontal mortise slot (perpendicular to the axis of the central hole) formed by the interlocked hubs of the first and second leg components. A gas lift post is received into the center, tapered hole of the assembled base locking all three components together.

Abstract: A chair base includes a hub having a longitudinally extending interior bore and an exterior surface. The bore includes an upper portion having a first interior wall and a lower portion having a second interior wall. The lower portion is positioned below the upper first portion. A stop feature is positioned between the upper and lower portions. The stop feature extends radially inwardly from at least the first interior wall. In various embodiments, the stop feature is curved. Methods of manufacturing a chair base are also provided.

Abstract: A chair base including a support body and a plurality of foldable assembly legs is disclosed. The support body has a plurality of supporting legs. The plurality of foldable assembly legs is movably coupled with the foldable assembly legs.

Abstract: The invention relates to a free-standing post comprising stabilizer means for stabilizing it on the ground, a non-rigid element for holding an article, which element extends upwards over a height H and has a bottom portion extended by a top portion. First anchor means are arranged between the stabilizer means and the bottom portion. In addition, a flexible longitudinal element is of length greater than the height H of the non-rigid element. Second anchor means are arranged between the bottom end of the flexible longitudinal element and the stabilizer means. Third anchor means are arranged between the top end of the flexible longitudinal element and the top end of the top portion of said non-rigid element. The invention also relates to a sport game set equipped with at least one such free-standing post.

Abstract: The disclosure relates to a chair comprising a seat part, at least one leg part, at least one foot part that consists of a predetermined plurality of foot elements and at least one spring assembly. According to the disclosure, at least one designated foot element and/or a sub-section of said element is configured to be mobile and is subject to a restoring moment under the action of a load.

Abstract: A supporting table having heaters inside a crystal-growing furnace includes a table plate and a plurality of supporting posts, wherein the supporting posts support the table plate and are, respectively, electrically connected with the heaters. Each supporting post includes, among others, a graphite electrode post, a metal electrode post, and an anchoring base. The supporting posts are each with its graphite electrode post screwed to a nut portion of the metal electrode post, and with the metal electrode post fixed to a wall of the crystal-growing furnace. The anchoring base includes, among others, a flange and an elastic washer, where the flange is welded to the wall of the furnace, and with the help of elasticity adjustment of the elastic washer, the supporting table can bear an equal distribution of loading from the supporting posts.

Abstract: A portable sign including three legs movable between deployed and collapsed positions and a flexible covering bearing text, graphics or both includes a biasing mechanism urging the legs toward the deployed position. A support within the biasing mechanism secures three springs with the coils facing outward, one extension from each spring embedded in an upper support member and another extension movable within a plane tangential to a periphery of a lower support member and received by a hollow portion of one of the legs.

Abstract: An automatically stabilizing table has an elongate support structure (14) supporting a table top (12) at an upper end and having a first pair of feet (50) at a lower end. An elongate guide formation (38) projects from a lower end of the support structure. A displaceable support member (30), having a second pair of feet (32), is engaged with the guide formation such that the displaceable support member is slidably displaceable along the guide formation and is automatically frictionally engageable with the guide formation in response to pivoting of the displaceable support member about a pivot axis which is transverse to the guide formation, to anchor the displaceable support member frictionally against sliding displacement relative to the guide formation. A pair of springs (48) is provided to urge the support member downwardly. The support member is located in channel shaped spokes (20) to inhibit swiveling thereof on the guide formation.

Abstract: A painters stand comprising a pair of extensible supports for rotatably securing a workpiece therebetween. Each support is comprised of a stanchion having a collar mounted thereon with a plurality of divergent legs extending therefrom with the stanchion having an intermediate workpiece support approximate the top end and a receiver for a workpiece fastener that will be fastened to a workpiece end whereby the workpiece can be supported between the stanchions. Once mounted in the workpiece receiver a plurality of radially positioned apertures are provided within the workpiece fastener so that one can be selectively co-aligned with a workpiece receiver aperture for insertion of a pin to secure the workpiece while a desired operation is performed, such as sanding and or painting.

Abstract: A vehicle seat mount is formed of a support hub adapted for securing a platform thereto, a stabilizer coupled for securing the support hub against rocking on a seat rest portion of the vehicle seat, a rear retaining element projected from the hub and adapted for engaging the vehicle seat between the seat rest portion and a backrest portion thereof, and a forward retaining element adapted for engaging a front portion of the seat rest portion of the vehicle seat.

Abstract: A support for a camera comprises a central hub (45) adapted to releasably connect with a plurality of radially displaced interchangeable arm or foot sections (A, B), wherein the arm section is adapted to interconnect if desired with an additional arm section and/or foot section to form a radially extending leg of a desired length. The hub may have a Mitchell type plate and is provided with one or more access windows to allow access to a central cavity.

Abstract: A table leg assembly includes an upright leg and two branch legs. The upright leg has two tubes longitudinally extended therefrom. Each tube has a joint member plugged into a lower end thereof. At least one positioning pin passes through the joint member. Each branch leg has a cylinder formed in one end thereof. The cylinder is coaxially connected to the tube. The cylinder has multiple positioning holes defined therein. The at least one positioning pin is corresponding to one of the multiple positioning holes and plugged into the corresponding one of the multiple positioning holes.

Abstract: An instrument stand with variable ground contact positions of its supporting pods is disclosed. It has a standing post mounted with two positioning rings. One of them is fixed, and the other can slide relative to the former. The positioning rings have several supporting bases and several connecting elements that fix with the supporting bases after angle adjustment. The supporting pods are locked on the two positioning rings. Each supporting pod is controlled by the relative motion of the two positioning rings to expand and collapse. The ground contact positions of the supporting pods of the invention are thus variable.

Abstract: A connecting structure detachably connects the upright post of a floor support to the upright frame supporting a panel lift device. The upright post has a pair of upright panels diverging forward to form a V shaped flange that has its lower portion open in front and a rounded knob mounted at the bottom of the post and spaced forward from the forward diverging V shaped flange. The post also has a pair of upright panels converging forward with upper portions of the panels tapering toward one another to form a pointed V shaped upper end. The frame has a forward diverging V shaped flange with an upper portion having dual pair of forward converging flanges in spaced relation to one another to form a forward converging V shaped slot.

Abstract: A foldable easel strut assembly is provided for supporting the easel when the easel is in use, and for moving the legs of the easel to a storage position when the easel is to be stored. The invention comprises an easel support board to which a rear leg assembly is pivotally connected. A pair of forward struts are pivotally connected at a first end to the support board. A pair of rear struts each have a first end pivotally connected to a second end of a corresponding forward strut, and a second end of each rear strut is pivotally connected to the rear leg assembly. Each rear strut includes a stop flange that abuts an upper edge of a corresponding forward strut when the rear leg assembly is pivoted away from the support board to a maximum position. In an embodiment, two front legs are pivotally connected to the support board, and the rear leg assembly comprises a rear leg member that pivotally folds against a bracket, and the bracket folds against the support board, when the easel is in its storage position.

Abstract: A portable human body pulsating apparatus has an air pulse generator mounted on a pedestal having wheels to facilitate movement of the apparatus on a surface. The pedestal has an upright piston and cylinder assembly operable to adjust the elevation of the air pulse generator.

Abstract: A K-base for a pole mounting system includes a central hub formed as a pentagon with legs extending from four of the five sides of the pentagon. The ends of the legs may splay to form clefts configured to receive a flat outer perimeter of the central hub so that the legs may be bolted to the central hub. The ends of the legs and the fifth unoccupied side of the pentagon may be formed to approximate a disk. In the central region of the central hub, on the top surface, an indentation may be formed to approximate an outer perimeter of a pole configured to be attached to the K-base. On the bottom surface, the central region may contain a depression sized to receive a washer and optionally a weight. Bolts extending through the washer and optionally through the weight may be used to connect the K-base to a pole. The washer may be formed to distribute stress from the bolts on the central hub.

Abstract: A protective shroud for a swing arm includes a housing made of two shroud sections that are snapped together around the base of a fixed seating arrangement. The assembled shroud includes two rectangular openings on its sides configured to allow the swing arms of the fixed seating arrangement to pivot on their axes within the shroud. The rectangular openings also include grooves on their upper and lower edges configured to receive a slidable rectangular shield member with a circular opening in its center. The rectangular shields fit over the opposed swing arms and slide within the grooves in the shroud halves as the swing arms pivot, thereby restricting access to the pinch points of the swing arms.

Abstract: A sign stand assembly includes a support base with a plate portion defining a locking recess, an upright mast joined to the support base, and at least one leg having a wall defining a hollow interior of the leg. The leg is pivotally attached to the plate portion, and a locking pin carried on the leg, is provided for movement toward and away from the locking recess defined by the plate portion of the support base. An actuator is movable between lock and unlock positions and has a first end portion engaging the locking pin, and an opposed second end portion with a hollow bail member defining a hollow interior for receiving the leg. A fulcrum portion is located adjacent the first end portion and engages the leg, whereby, upon pressing the bail member, the locking pin is retracted to the unlock position.

Abstract: A stand with at least three stand legs (2, 3, 4), which is embodied to fasten a leveling, plumbing, or angular calibration device (5), is provided, with the stand legs (2, 3, 4) being embodied rotational around a common axis (6) at their ends facing each other. Each stand leg (2, 3, 4) is bent by the same angle (?) at a distance from the axis (6), with a freely projecting section (14) of one leg being provided with a threaded bolt (15) freely protruding transversely thereto.

Abstract: A boom stand is constructed from a base, extensible stand, pivotal boom support, and boom. The base has arcuately segmented massive anchors that form a perimeter. The arcuately segmented massive anchors are shaped and sized to fit within the perimeter of like bases, to decrease minimum distances between stands during storage or close use, while still providing stability. Over-center clamps provided on the extensible stand are extruded to include unitary cord guides, and are engaged with tube ends to prevent rotation or accidental removal. The pivotal boom support incorporates a disc and elastomeric pads to provide superior locking and vibration reduction, and utilizes in alternative embodiments perimeter and central over-center clamps which further enhance the operation.

Abstract: An abdominal support swivel chair is comprised of a support base with a plurality of leg arms having casters and radiating about the base frame in a common horizontal plane. An adjustable center post assembly extends vertically from the center of the support base and along a central vertical axis. A seat is secured to a frame connected at a top end of the center post. The seat has a rear buttocks support section and a central narrow frontal projecting section merging therewith through opposed side thigh cavities. An abdominal support pad is secured to an adjustable support arm connected to the saddle frame. The support arm has an upper securing end section adapted for securement of the abdominal support pad and to position same inclined forwardly. The adjustable support arm extends forwardly of the frontal projecting section and aligned therewith and has an adjustable connecting mechanism to position the abdominal support pad for the comfort of a user person above the frontal projecting section.

Abstract: A unique pedestal designed for placement beneath an object such as a flowerpot. The pedestal includes multiple legs that are preferably attached to each other via a central pivot structure. Each of the legs is preferably adjustable in length and features a support foot adapted to contact a bottom surface of the object being supported. The pivot structure, in combination with the ability to adjust the length of each leg, enables a user to optimally position the pedestal's support feet to provide maximum stability and support for the object located atop the pedestal.

Abstract: An adjustable roller apparatus has a housing and a roller ball, rotatably mounted in the housing. There is also a base adjuster that is adapted to be moved from a first position to a second position and where one of the first and second positions of the base adjuster is a retracted position that permits the roller ball to contact a surface and rotate on the surface and the other position of the base adjuster is an extended position whereby the base adjuster contacts the surface.

Abstract: An automatically stabilizing table has an elongate support structure (14) supporting a table top (12) at an upper end and having a first pair of feet (50) at a lower end. An elongate guide formation (38) projects from a lower end of the support structure. A displaceable support member (30), having a second pair of feet (32), is engaged with the guide formation such that the displaceable support member is slidably displaceable along the guide formation and is automatically frictionally engageable with the guide formation in response to pivoting of the displaceable support member about a pivot axis which is transverse to the guide formation, to anchor the displaceable support member frictionally against sliding displacement relative to the guide formation. A pair of springs (48) is provided to urge the support member downwardly. The support member is located in channel shaped spokes (20) to inhibit swiveling thereof on the guide formation.

Abstract: An apparatus includes a central support shaft that has an elongated shape provided with axially opposed ends. Rectilinear legs have opposed ends conjoined to the bottom support shaft end and extending outwardly therefrom at an oblique angle. The legs are pivotal between compressed and expanded positions. Auxiliary support shafts have elongated shapes provided with opposed medial and lateral ends. The auxiliary shafts are pivotally conjoined to the brackets and pivotal about the medial ends, such that the auxiliary shafts can be independently biased between vertical and horizontal positions. Brackets are attached to the central support shaft and spaced along a longitudinal length thereof. Clamps are positional along the auxiliary shafts. Each clamp is adaptable between open and closed positions for releasing and gripping the window blind. The window blind is centrally registered between the auxiliary support shafts during cleaning operations.

Abstract: A foot supporting apparatus of a chair is disclosed. In one embodiment, the apparatus includes: i) a first foot supporting body that has a sector shape and that is contacted on a seat supporter, ii) a second foot supporting body that has a sector shape and that is rotatably disposed on the first foot supporting body such that the second foot supporting body is wrapped around the seat supporter with the first foot supporting body at need and iii) a coupling part that couples the second foot supporting body to the first foot supporting body or that uncouples the second foot supporting body from the first foot supporting body. According to one embodiment, the height of the foot supporting apparatus can be adjusted according to the length of the legs of the user, and the force of the feet of the user can be fully supported.

Abstract: A stand (20) for supporting a computer chassis (10) includes a support body (22), and a pair of clamping ledges (30) pivotally attached to the support body. The support body forms two resilient portions (25) corresponding to each clamping ledge. Each resilient portion forms a protrusion (34). Each clamping ledge corresponding to each resilient portion forms a pair of cutouts (36, 37). The pair of cutouts engages with the corresponding protrusion, respectively, to keep the corresponding clamping ledge in an upright position and horizontal position.

Abstract: A free standing frame for suspending a seat therefrom and for relative back and forth swinging thereto, comprises a support base wherein a pair of rear legs are longer than a pair of front legs to provide stability, a pair of frame sections that are assembleable to form a banana or C-shaped frame centered above the rear legs and having an upper end for suspending a seat and a lower end, and means for connecting the lower end of the frame to the base and orienting the frame and the center of gravity relative to the rear legs.

Abstract: A chair including a central, substantially vertical supporting member provided with a seat at the top, where the supporting member at the bottom end thereof or adjacent thereto is supported by a plurality of legs. Each leg is substantially horizontal, and one end of each leg is inserted into an opening in a projecting portion of a star-shaped member positioned at the bottom of the supporting member, the one end of each leg being secured in the opening by way of a snap effect and wherein each leg is secured to its respective projecting portion of the star-shaped member by a projecting, rounded guide member positioned at one end of the leg, the guide member being adapted to engage a recess in the under side of the projecting portion of the star-shaped member.

Abstract: A transportable intravenous stand for carrying medical fluids, such as blood plasma or saline solutions, so as to allow the fluids to be gravity fed into a patient. This invention comprises a base, a collapsible support member, and a hanger member to allow for hanging fluid-dispensing containers. The base being collapsible and support member telescoping so as to provide for a compact, easily transportable stand for use in the field when providing medical treatment to a patient.

Abstract: A spring-loaded shelf for an existing beverage cooler, which obviates the need for a user to reach more deeply within the confines of the cooler for a beverage as the contents of the cooler become depleted. The spring-loaded shelf has a base, a platform pivotally attached to the base by two scissor-type linkages, and a lifting mechanism for selectively and automatically raising the platform with respect to the base upon the scissor-type linkages, as the weight of the beverages placed upon the platform gradually decreases. Use of the spring-loaded shelf prevents injury to the user while retrieving a beverage from the cooler, and also provides for increased accessibility and visibility of the contents of the cooler.

Abstract: A base is provided for use with warning signs and the like. A metal structural framework is fitted to the underside of an elastomeric body in the form of a monolithic slab. Forces from the sign panel are transmitted through the structural framework, which includes a plurality of outwardly radiating legs. Forces are transmitted to the ends of the legs, which preferably are fitted with outwardly extending feet. Force loadings are transmitted through the structural framework rather than the elastomeric body, which provide a ballast for the structural framework.

Abstract: A method for forming rotatable bases for offices chairs characterised by structurally joining together at least two half-shells to form overall a plurality of spokes, each consisting of an elongated box-shaped body, and a central ring into which a column is inserted.

Abstract: A chair having a metal rod frame back assembly where the frame includes generally horizontal top, bottom and middle members and spaced apart generally vertical side members. Two seat brackets are welded to the middle and bottom members and attach to a seat board and two rod segments are welded to the side members. The seat board is covered with foam and upholstery. The back frame may be covered with springy mesh to give a thin elegant, yet comfortable back structure. Alternatively, foam is glued to a structural material and the material and foam combination and the frame are covered with upholstery. Arms and armrests are attached to the seat board and the seat and back assemblies with arms are mounted to a pedestal connected to a five spoke base riding on casters.

Abstract: An integrally formed caster socket is provided in a tubular framing member for a merchandising display or the like. The framing member has aligned stem receiving holes with the upper hole being on an outwardly domed frusto-conical shaped area and the lower hole is on an inwardly dimpled area of the lower frame wall. The socket configurations can be formed with simultaneous stamping or punching operations.

Abstract: The present invention provides a stable tripod stand for sensitive optical devices such as telescopes and the like. The tripod may be moved around on wheels which are coupled to casters and when positioned may be secured to the ground to provide an adjustable and highly stable support that significantly reduces the incidence of jitter. The tripod includes a stabilizer member that extends through the casters to selectively engage the ground. The leg members of the tripod have a triangular shape and support links between the platform and the leg members form interlocking triangular supports which reinforce the leg members.

Abstract: A decorative chair base having a metal substructure, a single molded plastic cover and a plurality of decorative inserts. The metal substructure has a central hub and radiating leg portions. At the extended ends of the leg portions are sleeves for mounting casters. The plastic cover also has a central hub and leg portions. The central hub of the cover fits over the central hub of the substructure and each leg portion of the cover overlays a leg portion of the substructure. Each leg portion of the cover has a raised end section, and a recess and there is a raised section surrounding the hub portion. An insert is mounted in each recess so as to be flush with the raised portions.

Abstract: An easily adjustable scope mounting head and stand. The stand includes a stabilized base with a vertical rod extending upward. The scope mounting head is attached to the vertical rod. A ball and socket joint is located on one end of the mounting head and an adjusting knob is located on the opposite end. The ball is equipped with accessible mounting mens for attaching a spotting scope or similar article. When the user slackens the adjusting knob, the ball and socket joint is free to move in roll, pitch, and yaw. In addition, the entire mounting head can rotate about the vertical rod and slide up and down the vertical rod. When the user tightens the adjusting knob, all degrees of freedom are locked. Thus, the single adjusting knob provides all needed adjustment for the height and orientation of the spotting scope.

Abstract: A transportable intravenous stand for carrying medical fluids, such as blood plasma or saline solutions, so as to allow the fluids to be gravity fed into a patient. This invention comprises a base, a collapsible support member, and a hanger member to allow for hanging fluid-dispensing containers. The base being collapsible and support member telescoping so as to provide for a compact, easily transportable stand for use in the field when providing medical treatment to a patient.

Abstract: A foldable supporting framework comprises a retaining seat has an upper positioning sheet and a lower positioning sheet. At least one movable block is rotatably fixed to the upper and lower positioning sheets. There are at least two supporting posts; one supporting post being locked to the fixing threaded hole of the sealed side. Each of the other supporting posts is locked to the screw hole of a respective movable block. Thereby, at least two supporting posts are locked to the sealed side and the movable blocks. An axial rod is inserted into the upper positioning hole and the lower positioning hole of the retaining seat, and the axial rod is provided to lock other object. When the movable blocks rotate around the studs, each supporting post can be expanded so that all the supporting posts are aligned to reduce the volume of the supporting framework.

Abstract: A stand includes a holding frame and a plurality of spaced apart leg units. Each leg unit includes an upper leg having an upper end connected securely to the holding frame and a lower end, and a lower leg having an upper end pivoted to the upper leg adjacent to the lower end of the upper leg so as to be rotatable between a folded position, in which the lower legs are disposed in a storage space defined by the upper legs, and in which the lower ends of the upper legs can be seated on a supporting surface, and an extended position, in which lower ends of the lower legs are disposed at an elevation below the lower ends of the upper legs, and in which the lower ends of the lower legs can be seated on the supporting surface.

Abstract: A portable music stand comprises a base element that contains therein a telescoping extension and a compressible music rack. The compressible music rack attaches to the extension at a position distal from a bottom of the base, and the extension has a fixing system for supporting the extension at a fixed position relative to the base.

Abstract: The disclosure relates to a spreader mechanism for supporting the legs (11) of a tripod erect, comprising a hub (13) having a central axis, three arms (14) pivotally mounted on the hub at positions equi-spaced around the hub to swing with respect to the hub axis between extended and folded positions. A drive mechanism (19, 22) coordinates movement of the arms so that all three arms remain in the same relationship to the hub axis throughout the range of movement of the arms, and a locking device (26, 29, 30, 31, 32) locks the drive mechanism against movement at any position throughout the range of movement of the arms. The locking device may be released held by a push button operated mechanism (50, 51, 36, 34) to allow adjustment of the spreader member and the holding means is deactivated to allow engagement of the locking device to lock the arms in a selected position of adjustment.

Abstract: A hunter's chair specifically designed for use in hunting blinds and/or tree stands includes a cushioned seat member with a cushioned backrest portion vertically extending therefrom. On the rear surface of the backrest portion is a pouch for receiving accessory items. Extending from the bottom surface of the seat member is a telescoping leg having a base structure on the lower end thereof The base structure includes a plurality of radially extending arms, each having an aperture at a distal end for receiving a fastener means to secure the chair to a support surface. A lever on the lower surface of the seat member operates a pneumatic lift assembly that extends and retracts the telescoping leg to adjust the height of the seat member.

Abstract: The present invention relates to a safety device for stabilizing cylindrically shaped objects and thereby reducing the occurrences of uncontrolled releases of their contents. With respect to an exemplary embodiment, a stabilization mechanism is presented which comprising a cylindrically shaped barrel, having a first opened end and a second opened end and which is fitted with a plurality of stabilization outriggers. Each of the plurality of outriggers extends from the exterior surface of the barrel, radially outward away from the barrel. The interior diameter of the barrel is sufficient to accept a pressurized cylinder or tank. The outriggers effectively increase the diameter of the base of the cylinder, and so doing, provides an added measurement of stabilization with respect to toppling over from an inadvertent action. In the other exemplary embodiments, as few as three outriggers provide stabilization for the cylinder.

Abstract: A leg support for furniture is disclosed. The leg support for furniture has a base body and a plurality of rods, characterized in that the base body is provided with a plate body having a top face for locking to the furniture, the bottom face of the plate body is provided with a plurality of sleeves for mounting with the rods such that the sleeves and the rods are formed into a structure having a strong resistance to torque; the top end of the rod is provided with a screw hole such that the rod can be urged to the sleeve by means of the upward pull of an urging bolt, thereby the leg support which can be easily assembled and dissembled is obtained.

Abstract: A tripod includes a body, three legs, a connecting bracket and a post. The body has a top surface, and the connecting bracket is attached to the top surface of the body. The post has a top end and a bottom end, and the bottom end of the post is pivotally attached to the connecting bracket. The three legs are attached horizontally to the body. Two of the legs are pivotally attached to the body such that the legs can be pivoted away from each other within an angular displacement. Consequently, the tripod will stand firmly on the ground to support an object such as a sheet music holder.

Abstract: A multi-leg stand mainly includes a vertical main tube and a tripod structure connected to a lower end of the main tube. The tripod structure includes an inner tube around which a locking element and three unions are sequentially mounted from top to bottom. Three legs are separately connected at inner ends to the three unions. When the locking element engages with the first union at a first locking position, the three legs are folded to locate at the same side of the main tube, and when the locking element engages with the first union at a second locking position, the three legs are equally angularly spaced and radially extended. And, when the locking element is in a releasing position on the inner tube, the three unions may be freely turned in one direction with only one hand to quickly and accurately move into the folded or the spaced position.

Abstract: A castored base (18) for an office chair includes a plurality of radially extending legs (300), each leg having a socket or sleeve (308) fixed thereto adjacent an outer end thereof. A castor (302/402) is connected to each socket or sleeve (308), each castor having two wheel portions (312/412) and an axle assembly (316/404). The axle assembly includes an axle (314/414) to which the two wheel portions are rotatably mounted in spaced disposition and including a pin (318/418), wherein the pin (318/418) of each castor is received in a respective socket or sleeve (308) which extends at least in part between the two wheel portions (312/412). Only a small clearance is required between the underside of the legs (300) and the tops of the castors (302/402). Further, low profile legs (300) may be used in the base (18), while still providing the required strength and stability.